resultListMenu.add(visErrors);
JMenuItem visGrph = new JMenuItem("Visualize tree");
if (grph != null) {
if(((Drawable)temp_classifier).graphType()==Drawable.TREE) {
visGrph.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String title;
if (vp != null) title = vp.getName();
else title = selectedName;
visualizeTree(grph, title);